80 entries under still topic. ×

30
dull(verb, adjective, calm, quiet, simple)
30
silent(adjective, calm, close, quiet, soft)
24
mute(adjective, calm, dull, close, quiet)
20
voiceless(adjective, quiet, speak, silent)
14
taciturn(adjective, calm, close, quiet, soft)
12
quiet(verb, adjective, calm, dull, close)
7
incoherent(adjective, quiet, soft, confused)
5
silence(verb, calm, dull, quiet, suppress)
5
uncommunicative(adjective, close, quiet, soft, low)
4
close(adjective, quiet, soft, low, restrained)
4
reticent(adjective, close, quiet, soft, low)
3
soundless(adjective, close, quiet, soft, low)
3
closemouthed(quiet, soft, reticent, silent)
3
inaudible(adjective, close, quiet, soft, low)
3
laconic(quiet, soft, aloof, reserved)
3
muted(adjective, close, quiet, soft, low)
3
reserved(adjective, close, quiet, soft, low)
2
faint(adjective, quiet, soft, shaky)
2
noiseless(adjective, close, quiet, soft, low)
2
choke off(verb, expression, phrasal verb, calm, dull)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>